I recently switched to VS 2010. While using AjaxToolkit version=4.1.51116.0, I am getting run-time error :
Could not load type 'System.Web.Script.AjaxFrameworkAssemblyAttribute' from assembly 'System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.**
This error is coming while using any of the AJAX toolkit control. I am using ToolkitScriptManager.
How to solve this error? suggestions are greatly appreciated.